NEW '84-'87 Buick Turbo Regal/Grand National Hydroboost, Power Brake Booster

Description

This is a new
(not rebuilt)
hydroboost and mount set up to run inverted in a '84-'87 Turbo Regal/Grand National, T Type.
***Also available mounted right side up on request.***
It will replace the Powermaster and firewall mounting bracket as a direct bolt in on Powermaster equipped vehicles and replaces the OEM hydroboost on earlier vehicles. This fits the '81 Regal (Diesel)/El Dorado master cylinder. No modification to your firewall is required. This is a direct bolt in application. Remove the OEM hydroboost or Powermaster mounting bracket, add four bolts through the new hydroboost mount to the firewall, attach the rod end to the brake pedal and it's in.
***Regarding the length of this unit.
The length from the firewall mounting surface to the MC mounting surface of the hydroboost is 7.7". That is ~1" longer than the OEM '82-'85 Turbo Buick hydroboost is and ~2.8" shorter than the OEM Powermaster but you have to add the MC length. While a '78 Vette PB MC is going to be a direct bolt up it's also about 8" bringing the overall length to ~15.8" and it will be about the same with the standard Wilwood MC. However, Wilwood's Compact MC is only 6.55" which would make the overall length ~14.35"
and that will be about the same length as the OEM '82-'85 Turbo Buick hydroboost/MC combo.
The Wilwood MC shown in the listing pics for demonstration is Wilwood's standard, longer length (8.15") MC, note that it clears everything.
***Note, All aftermarket MCs that I am aware of come with a MC piston bore adapter that when used with hydroboost will cause too much pre-load on the MC resulting in rear brake lock up as the port gets covered due to the pre-load. That bore adapter will need to be shortened for correct pre-load as specified by the MC manufacturer. Check your tech but I believe Wilwood specs at zero pre-load.
***For inverted hydroboost the return nipple will point towards the motor and if you require greater clearance for the return line y
ou can search on ebay for the AN-6 "spittier fitting" and use that to replace the return nipple. When using black rubber return line get a 90* pushlock AN-6 fitting and install that on the return line.
If you are using stainless braid line then just use a return line with the 90* AN-6 fitting at the hydroboost end.
***Regarding use of replacement return hose fittings on the booster:
When the booster is inverted or clocked on the mount for clearance to the motor the return nipple points the hose at the header or into the inner fender depending on the vehicle and set up. If you don't use a banjo fitting there and use an AN-6 Spittier fitting then you need to know to before you install it to take a #35 drill bit (or 0.110") and make sure it passes through the orifice before you use it and drill it if it doesn't. 0.110" is OEM ID for Bosch return fittings and anything undersize can cause slow pedal return.
***To adapt your existing PS pump hard line male 16mm o-ring fitting to AN-6 male for your new PS hose ends Earls has black or blue fuel line adapters in female 16mm o-ring that will work:
AT9894DBJERL (black) or 9894DBJERL (blue).
If you  have a vacuum brake Regal you will need to source a hydroboost/powermaster brake pedal as the lug on the pedal is in a different location.
Tech, and pictures of custom hydroboost installations as well as my contact info can be viewed on-line at CustomPowerBrake or BadAspBrakes.
Wondering how much better this works than your electric brake booster? I asked a customer with an '87 GN who also supplied the installed pics of a unit I set up for him to run right side up so he could use the earlier hydroboost lines and this is what he had to say about:
“Yes, I foot brake this car and they hold the car with no problems. This car leaves the line with the wheels off the ground and runs 5.90 in the 1/8 mile and is putting out almost 900hp. It worked out fine… the best brakes this car ever had.”
****Allow me to dispel some myths...
#1
There simply are no vacuum boosters
that will give you the same dramatic increase in line pressure at the caliper that hydroboost will provide. #2 The largest vacuum booster you could possibly fit would only give you about 1,700 psi at the front caliper and that is if you had room to fit it and the engine produced the vacuum it was designed for. If you have a low vacuum motor and a 7" dual diaphragm  booster (like a customer of mine with a built 5.7 Hemi who tested line pressure with a gauge) you will only get 1,000 psi at the front and 800 at the rear calipers. You need about 1,600 psi up front for disc. After installing my hydroboost he tested it at what you can see in my last pic above. Got it? ;) Thats an increase of 1,400psi at the front caliper at idle. 2,400psi..... yes, your pedal will be lighter;) John's car is a '37 Plymouth Tudor and he hauls a trailer for his two Harleys. His comment to me after the installation of the hydroboost was "this thing could stop freight trains". Thanks for the testing, pics and feedback John! It's what dispels myths. #3 Installing a hydroboost does not just make your pedal easier to press, ask anyone who has hydroboost installed. I have had a lot of customers tell me that swapping to hydroboost was the best modification they made to their vehicle and should have been the first. Think about it for a minute.... is it really going to help your braking if you switch from 11" disc to 13" and go from single piston calipers to four piston if you still are only going to have 1,000 psi at the front caliper when you need at least 1,600 psi? Yes, the braking would improve over what you had but you still don't have the line pressure and only changing the booster to hydroboost is going to give you 2,400 psi. To my knowledge, not even electric boosters will give you that much pressure and 2,600 psi is obtainable with the right master cylinder.
Installation of hydraulically boosted brake systems will increase your line pressure up to a maximum of 2,600psi
(as tested and I have a gauge reading to demonstrate pressure at idle)
depending on the master cylinder you select and the other components in your brake system. Consequently your brake system must be in top shape to handle increases from normal 1,100-1,600psi.
No pressure hoses or port fittings are provided with this hydroboost. The ports are 18mm pressure in from the pump and 16mm pressure out to the steering box. ***Be sure the power steering pump you are using will be adequate to run with hydroboost which typically require 1,300-1,500psi and 2.5-3.5gpm. This hydroboost is not designed to be operated with power steering pumps exceeding 1,500psi. It is compatible with ABS.
Please review tech, pics of my customer's installations or contact me at: Custom Power Brake
If you have a different vehicle you'd like to set up with a custom firewall mount just shoot me a message and I'll work with you if I think it can be done. The bolt spacing for the master cylinder is 3.4" and if you need a custom adapter to fit a 3.2" spaced Dodge or Ford master cylinder. I can help you sort out what you need for your hot rod or built rock buggy using the largest dual piston calipers.
I have set up C3 Corvettes, Chevy S10s, Toyota FJ 40s, Jeep Commandos, Wranglers, CJs, and the M715 as well as the full size Jeep Wagoneers, Cherokees and J series trucks, Scout II, Ford Ranger, F150, '67 Camaro, '70-'77 Camaro, '70 Chevelle, and I've currently mapped out a '57 Buick, '55-'57 Chevy and Jeep TJ, ZJ, MJ, XJ, '70 Chevelle, Toyota T100/Tacoma.
Shipping is quoted for the US only. I have shipped these to Thailand, Mexico, Russia, New Zealand,
Brazil, Panama, Latvia, Spain,
Turkey, Sweden, Quatar, Norway, France, Italy, Germany, Denmark, Dubai, UK, Canada, Greenland, Iceland, Australia and South Africa, but please contact me prior to purchasing so we can work out acceptable shipping arrangements. I will provide you with a shipping quote for you to consider PRIOR to your purchase.  I will only accept paypal on purchases outside the US. I request that in the text of your message you indicate
the country and postal code
you wish the unit shipped to.
Regarding feedback, I will leave feedback for the purchaser after I have received feedback.
Disclaimer:
Hydro-Boost is a registered ® trademark of the Robert Bosch Corporation. All products herein are modifications and not directly or indirectly affiliated with the Robert Bosch Corporation unless noted. Custom Power Brake (aka Sterlingworth16) is not affiliated with Bosch. All products herein are designed for off road use only and are not DOT certified. The process to meet DOT certification is extremely lengthy. To my knowledge, no other aftermarket modifier of hydroboosts has their units DOT certified for street use either. Any purchase of product and/or use of tech related to these products constitute the understanding that brake line pressure will be dramatically increased and the acceptance of liability or risk related to use.
Key words: hydrobooster, hydro boost, hydro-boost, hydro-booster, hydraulic booster, hydraulic brake booster, power brake booster, astro van, safari van, Jeep CJ, Jeep YJ, Jeep Wrangler, Toyota FJ40, Jeep TJ, '55, '56,'57 Chevy, '57 Buick.